Technical Resources

Internal Access

The MK100 case is very simple to open. Remove the two screws from the sides and slide the lid off towards the rear.

MK100B-40

Motherboard

Manual, Drivers, Datasheet

Technical information related to the system's motherboard can be found from the support link below

Auto Power On

The auto power on feature will turn the server on automatically when AC power is connected or when power is restored after an outage.

1. Power on the server and press F2 a few times to access the BIOS

2. Navigate to the Advanced tab

1. Open the Chipset Configuration menu

2. Locate the Restore AC Power Loss Option

3. Change it to 'Power On'

Technical information related to the system's motherboard can be found from the support link below

1. Unplug the system from all power and peripherals and perform the .

2. Locate the AT/ATX jumper

3. Move it over by 1 pin

1. Auto power on is now enabled

1. Unplug the system from all power and peripherals and perform the .

2. Locate the CLRMOS1 jumper

1. Move the jumper over by 1 pin

2. Wait 30 seconds

3. Restore the jumper to its original position

Technical information related to the system's motherboard can be found from the support link below

1. Unplug the system from all power and peripherals and perform the .

2. Take the jumper circled in blue and move it to the pins circled in orange

1. The unit is now configured for auto power on

1. Unplug the system from all power and peripherals and perform the .

2. Locate the clear CMOS jumper

1. Move the jumper over by 1 pin

2. Wait 30 seconds

3. Restore the jumper to its original position

4. The CMOS is now clear

The MK100/MK150 series can be installed with various mounting options, including:

• Wall mounting brackets:

• Direct installation into a server rack

• Sliding rail kit:

This guide go overs the basics of swapping the Flex ATX style PSU used in all variants of the MK100 series.

• Begin by removing the two lid screws – one on each short side of the case.

• Remove 4x screws from the power supply. Discard the larger 2 screws from the left holes.

• Pull the lid back 2″ and lift it up

• Remove 2 screws from the crossmember. Cut all zip ties along the crossmember.

• Lift the crossmember out

• Remove 2 screws from the back of the power supply

• Unplug the Molex connector for the drives

• Squeeze the locking tabs and pull the power cables out.

• Lift the power supply out of the case.

• Watch out for any zip ties that may still be holding it. Cut them if needed.

• Remove and save the 24pin to 4pin adapter

• Leave the system sitting on a flat surface for this next step.

• Remove the 5mm standoffs from where the power supply was screwed in.

• Keeping the system sitting flat on a surface, drop in the new power supply.

• Re-install the standoffs in the back. They will hold the power supply in place.

• Install the 2 coarse thread screws into the back of the power supply.

• Use the smaller 2 of the 4 you removed earlier.

• Watch the 2 clips below for final cabling and assembly.

For the latest security advisories concerning OnLogic products, including vulnerability disclosures and necessary updates, please refer to our official Security Advisories page. It is recommended to regularly check this resource for critical security information.

1 - Product Overview

1.1 - Introduction

The OnLogic MK101B-43 is a robust 1U rackmount server meticulously engineered to provide reliable, powerful, and scalable computing for demanding enterprise and industrial applications. Designed for high performance, it supports AMD EPYC™ 4005/4004 and AMD Ryzen™ 7000 Series Processors on an AM5 socketed motherboard, paired with up to 4x DDR5 UDIMMs for high-speed memory capacity. With expansion options including hot-swap 2.5” drive bays, internal 3.5” storage, and multiple M.2 slots, along with a FHHL PCIe4.0 x16 slot, the MK101B-43 offers exceptional configurability. Integrated ASPEED AST2600 graphics and a dedicated IPMI LAN port via Realtek RTL8211F ensure robust server management capabilities.

1.2 - Safety

1.3 - Box Contents & Accessories

If you purchased additional items such as mounting brackets, power supplies or terminal block connectors, they will be located in the system box or within the outer shipping carton.

System Contents

The following accessories are included with every system:

• Power cable

• 20" (508-680mm) friction slide rail

If additional items were purchased, they will be included in the system packaging.

For more information on accessories and additional features, visit the MK101B-43 product page:

The system label is located on the top of the chassis in the rear-right hand corner as depicted in the image below. The system label will contain the following information:

• System Model

• OnLogic Serial Number

• Regulatory & Compliance Certification Logos

*There is an LED on each side of the IPMI LAN port. Please refer to section 2.2 for LED definitions.

**There is an LED on each side of 1GbE LAN port. Please refer to section 2.3 for LED definitions.

The MK101B-43 features the following onboard Ethernet ports:

There are 4x USB 3.2 Type-A ports in the rear and 2x USB 3.2 Gen 1 Type-A ports in the front of the MK101B-43 Server.

There is one VGA Video port located on the back of the MK101B-43 Server. This is connected to the AST2600 BMC Chip.

There is one HDMI port located on the back of the MK101B-43 Server. This is connected to the processor’s iGPU

There is one Display Port located on the back of the MK101B-43 Server. This is connected to the processor’s iGPU.

The motherboard top and bottom view for System SKU is as below.

* For DIMM installation and configurations instructions please see section 3.19.1 - DIMM Population Requirements

Fan functionality will be noted by 2 LED colors, red and green. If the LED is green, the system fans are running as expected. If the LED is red, the system fans are experiencing unexpected fan speeds.

The illustration shows how jumpers are configured. When the jumper cap is placed on the pins, the jumper is “Short”. If no jumper cap is placed on the pins, the jumper is “Open”. The illustration shows a 3-pin jumper whose pin 1 and pin 2 are “Short” when a jumper cap is placed on these 2 pins.

Important Note: This is the only jumper on the motherboard. All other headers and connectors are NOT jumpers. Do NOT place jumper caps over these headers and connectors. Placing jumper caps over the headers and connectors will cause permanent damage to the motherboard.

Connect the power switch, reset switch and system status indicator on the chassis to this header according to the pin assignments. Be careful to note the positive and negative pins before connecting the cables.

This header supports multiple functions on the front panel, including the front panel SMB (System Management Bus), internet status indicator and chassis intrusion pin. Some functions of this header are unused in the MK101B-43 Server.

This header supports the two Front Panel USB3.2 Gen 1 ports.

This header supports up to two USB2.0 ports. It is unused in the MK101B-43 server.

This header supports a speaker in the chassis. It is unused in the MK101B-43 server.

These headers connect to the chassis cooling fans. All fans support Fan Control. FAN2, FAN3, and FAN5 are not used in the MK101B-43. Default fan configuration starts 30% and will increase incrementally based on component temperatures.

The standard motherboard power input is a 24-pin ATX power connector. To use a 20-pin ATX power supply, please plug it along Pin 1 and Pin 13.

Two 8-pin ATX 12V supplemental motherboard power inputs are provided.

The MK101B-43 supports an optional discrete TPM 2.0 module. The TPM module included with the MK101B-43 Server is the Infineon SLB9670 TPM2.0 (13-pin SPI module)

PSU SMBus monitors the status of the power supply, fan and system temperature.

This 4-pin connector is used to provide a cabled base-board or front panel connection for value added features and 3rd-party add-in cards, such as Emergency Management cards, that provide management features using the IPMB. It is unused in the MK101B-43.

The header is used for the SMBus devices. It is unused in the MK101B-43

This header is used for PWM configurations. It is unused in the MK101B-43

This allows users to clear the data in CMOS. To clear CMOS, take out the CMOS battery and short the clear CMOS Pad.

These four SATA3 connectors support SATA data cables for internal storage devices with up to 6.0 Gb/s data transfer rate.

This header is intended for connecting either end of VGA_2X8 cable to VGA header. It is unused in the MK101B-43.

A socket is provided for a CR2032 battery. Regulatory requirements dictate the installed battery shall be rated for operation to at least 85°C.

The MK101B-43 supports up to four 288-pin DDR5 DIMM slots in two groups, and supports Dual Channel Memory Technology.

The following rules apply to when populating DIMMs in the MK101B-43 Server:

1. For dual channel configuration, install identical DDR5 DIMM pairs (the same brand, speed, size and chip-type) .

2. Dual channel technology cannot be supported with only one or three memory modules

3. Only DDR5 DIMMs may be installed into the system. Other memory modules may damage the system

When populating DIMMs within the system, the following population is recommended for each CPU configuration in order to maximize overall system performance (✔ indicates a populated slot):

The system supports 4x DIMM slots, 192GBs of memory, and ECC/non-ECC UDIMMS. Maximum DIMM frequency is dependent on the number of DIMMS populated in the system.

When a GPU is installed in the system, it is recommended that the minimum system memory should be at least 1.5 times the total GPU memory. For superior performance and to accommodate future workloads, it is strongly recommended that the system memory be 2.0 times the total GPU memory. Failure to meet these memory requirements may result in degraded performance or unexpected application behavior.

Dr. Debug is used to provide code information, making debugging easier. Please see the charts below for Dr. Debug code information. To see where the Digital Display is on this motherboard, return to section 1.9.2 to view the motherboard map.

Please follow the instructions below to open the system and service the specified component or device.

Important Notes:

• Before removing the top cover, the system should be powered off and the power cord unplugged.

• The system must be operated with the chassis top cover installed to ensure proper cooling.

Step 1: Remove the screws that secure the top cover to the chassis. Step 2: Push the top cover toward the rear of the chassis to remove the cover from the locked position. Step 3: Lift up and remove the top cover.

Step 1: Lower the top cover on the chassis, making sure the side latches align with the cutouts. Step 2: Slide the top cover toward the front.

Step 3: Secure the top cover with the screws.

Step 1: Release the screws that secure the hard drive carrier to the chassis. Step 2: Lift up and remove the carrier.

Step 1: Place the 3.5" HDD into the carrier with the printed circuit board side facing down. Carefully align the mounting holes in the hard drive and the carrier. Step 2: Secure the hard drive using the screws. Step 3: Place the drive carrier, with a 3.5" HDD installed, back to the chassis with screw holes aligned. Step 4: Secure it to the chassis with screws.

Step 1: Press the locking lever latch on the drive tray to unlock the retention lever. Step 2: Rotate the lever out and away from the module bay and pull the hard drive out of the HDD tray

Step 1: Place a 2.5" HDD into the bracket with the printed circuit board side facing down. Step 2: Slide the drive tray into the HDD bay until the drive is fully seated. Step 3: Push in the locking lever to lock the HDD tray into place.

System fans are required for the cooling in the system. Please make sure that the chassis top cover is properly installed in order for the cooling air to circulate properly through the chassis and cool the system and components.

If a fan fails, the ambient air temperature in the chassis will rise. Replace any failed fan immediately.

Step 1: Remove the cover. Unplug the fan connector and remove the failed fan. Step 2: Align the mounting holes on the fan bar with the fan mounts on the replacement fan. Step 3: Gently place the fan on the fan bar. Make sure the fan is well seated.

Step 4: Plug the fan wires into the correct fan header.

This system has a single 315 watt power supply and can accommodate one AC power supply in the bay at the rear of the chassis. There is no power supply redundancy so if the power supply unit fails, the system will shut down and the user will need to replace the power supply unit.

Images below are illustrative and may not accurately depict the CPU heatsink

To remove the CPU:

Step 1: Loosen the 4 corner fasteners on the cooler in a star pattern to ensure even pressure release.

Step 2: Gently pull the CPU cooler up by the edges.

Step 3: Once the cooler is removed, remove any thermal grease from the CPU.

Step 4: Release the CPU latch lever pushing the end of the lever down and away from the CPU

Step 5: Lift the lever to release the CPU bracket, then lift the bracket to expose the CPU and socket

Step 6: Remove the CPU from the CPU socket by lifting the latch lever.

Step 7: If not immediately reinstalling a CPU, fit a socket cover into the CPU socket to protect the pins. Close and secure the CPU bracket and lever. If immediately replacing a CPU skip to step 3 below.

To replace the CPU:

Step 1: Release the CPU latch lever pushing the end of the lever down and away from the CPU.

Step 2: Lift the lever to release the CPU bracket, then lift the bracket to expose the CPU and socket.

Step 3: Line the CPU up on the CPU socket using the golden triangle found on the corner of the CPU and additionally using the notches found on the CPU and CPU socket.

Step 4: Gently place the CPU into the socket.

Step 5: Close the CPU bracket over the CPU. Close the latch lever and secure it by pressing down and towards the CPU. Ensure the lever latches under hook and remains secure when pressure is released.

Step 6: Apply thermal grease to the CPU surface.

Step 7: Install the heatsink using the four screws around the CPU socket.

After the CPU is installed into the system, a heatsink will need to be installed to dissipate heat. Thermal Paste comes pre-applied to the heatsink.

Step 1: Remove 4x screws

Step 2: Remove the brackets from the motherboard.

Step 3: Attached the Heatsink provided with the system onto the motherboard.

To remove DIMMS:

Step 1: Press down on the latches on the DIMM slots on the motherboard until they are tilted away from the DIMM.

Step 2: Gently pull the DIMM out of the slot.

To replace DIMMS:

Step 1: Press down on the latches on each side of the DIMM slot on the motherboard until they are tilted away from the DIMM slot.

Step 2: Line up the notch in the DIMM with the notch in the slot to ensure the DIMM goes in correctly.

Step 3: Gently press the DIMM into the slot until an audible click is heard which indicates the latches have been engaged and are holding the DIMM in place.

For the full BIOS manual, please .

Update the BIOS with the file(s) above. You can follow this guide for installation instructions.

(Follow our guide for )

This allows users to clear the data in CMOS. To clear CMOS, take out the CMOS battery and short the clear CMOS Pad.

This device has been tested to the relevant EMC and Safety standards. Modifications by the user may invalidate certifications. Testing included EN 55032, EN 55035, EN 60601-1-2, EN 62368-1, and IEC 60945 Ed. 4.

This device complies with part 15 of the FCC rules as a Class A device. Operation is subject to the following two conditions: (1) this device may not cause harmful interference and (2) this device must accept any interference received, including interference that may cause undesired operation.

This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.

Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.

The computer system was evaluated for medical, IT equipment, automotive, maritime and railway EMC standards as a class A device. The computer complies with the relevant IT equipment directives for the UKCA mark.

This is a Class A product based on the standard of the Voluntary Control Council for Interference (VCCI). If this equipment is used in a domestic environment, radio interference may occur, in which case the user may be required to take corrective actions.

For the latest security advisories concerning OnLogic products, including vulnerability disclosures and necessary updates, please refer to our official Security Advisories page. It is recommended to regularly check this resource for critical security information.